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Publication numberUS5916211 A
Publication typeGrant
Application numberUS 08/890,970
Publication dateJun 29, 1999
Filing dateJul 10, 1997
Priority dateNov 3, 1995
Fee statusPaid
Publication number08890970, 890970, US 5916211 A, US 5916211A, US-A-5916211, US5916211 A, US5916211A
InventorsHew W. Quon, David K. Quon, Wanda A. Quon
Original AssigneeQuon; Hew W., Quon; David K., Quon; Wanda A.
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Permanent hair removal using visible red wavelength spectrum lasers
US 5916211 A
A device for permanently removing hair and a process for using that device comprising a laser emitting light in the visible red wave length spectrum, the laser light being used to destroy the hair follicle. A high energy laser is used with the light being delivered in pulses of from about 1 to 1000 microseconds.
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What is claimed is:
1. A method for permanently removing hair comprising:
a) generating a pulsed beam of red spectrum laser light using a laser having a power output from 10 joules/cm2 to 50 joules/cm2, and
b) irradiating a hair follicle with the pulsed beam of light, said beam of light having a pulse duration of from 1 microsecond to 1000 microseconds.
2. The method of claim 1 wherein the beam of light has a wave length of from about 600 to about 800 nm.

This is a continuation of application Ser. No. 08/552,790, filed Nov. 3, 1995 now abandoned.


The present invention relates to a process for removing unwanted hair on humans or animals.

Hair grows in three different cycles. The traditional method of hair removal, namely thermolysis or electrolysis, require the use of a needle or a chemical. Further, these methods can only destroy hairs in their anagen stage. Still further, the chemicals can cause a reaction on the skin surface and the needle can cause injury to the skin as well as be a source for infection.

Thus, there is a need for a process for removing hair during all stages of hair development and without the use of harsh chemicals or instruments which can cause scarring or be a source of infection.


These needs are met by the present invention which comprises a high power laser emitting a red wavelength beam of light with a sufficiently long pulse time to destroy the hair follicle. With a properly configured laser, the laser light selectively and permanently destroys the hair follicle without damaging the surrounding tissue or blood vessels.


Hair grows in three different cycles. Thermolysis and electrolysis are only effective in the anagen stage. However, all hair follicles, regardless of the stage of development of the hair, share a basic property in that the hair follicle contains abundant melanin. I have now discovered that by use of a high powered laser emitting a beam of visible red light of an appropriate power density and pulsewidth, each individual hair can be selectively destroyed by coupling directly with the melanin within the hair follicle without causing injury to other tissue.

Permanent destruction of hair is accomplished by focusing the optical output of a high power laser (10-50 joules/cm2) operating in the red wavelength spectrum (600-800 nm) on the base of the hair to be eliminated. The laser generated light is able to penetrate the skin or transmit along the pore out of which the hair is growing to reach the melanin in the hair follicle. One skilled in the art will recognize that the laser beam is not delivered continuously but consists of a series of pulses of light. If the duration of individual pulses of the laser beam is from 1 to 1000 microseconds the laser energy will destroy the hair follicle without causing damage to the surrounding vascular tissue or skin, thus resulting in permanent destruction of the hair.

Although the present invention has been described in detail with reference to a certain preferred version and use thereof, other versions and uses are possible. For example, the process described can be supplemented and improved by use of other techniques described in prior art. However, such added procedures, or other procedures to prepare the skin surface for treatment, only enhance the process described above. Therefore, the spirit and scope of the appended claims should not be limited to the description of the preferred versions contained herein.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US4388924 *May 21, 1981Jun 21, 1983Weissman Howard RMethod for laser depilation
US4617926 *Jan 30, 1984Oct 21, 1986Sutton A GunillaDepilation device and method
US5059192 *Apr 24, 1990Oct 22, 1991Nardo ZaiasMethod of hair depilation
US5182857 *Oct 29, 1990Feb 2, 1993U.S. Philips Corp.Shaving apparatus
US5226907 *Oct 29, 1991Jul 13, 1993Tankovich Nikolai IHair removal device and method
US5425728 *Jan 19, 1993Jun 20, 1995Tankovich; Nicolai I.Hair removal device and method
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7044959 *Mar 12, 2003May 16, 2006Palomar Medical Technologies, Inc.Method and apparatus for hair growth management
US7217267 *Feb 6, 2004May 15, 2007Harvey JayHair treatment method
US7837675May 31, 2005Nov 23, 2010Shaser, Inc.Method and device for skin treatment with replaceable photosensitive window
US8246613Oct 4, 2010Aug 21, 2012Shaser, Inc.Method and apparatus of treating tissue
US8393330Jun 25, 2012Mar 12, 2013Harvey H. JayHair treatment system and method
U.S. Classification606/9, 607/89, 606/3
International ClassificationA61B18/20
Cooperative ClassificationA61B2018/00476, A61B2018/00452, A61B18/203
European ClassificationA61B18/20H
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